Apparatus for burning coal-dust.



No. 746,864. PATENTED DEC. 15, 1903 B. w. M Y. APPARATUS FOR BURNINGGOAL DUST.

APPLICATION FILED NOV. 2. 1900.

K0 MODEL.

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No. 746,864. Patented ijecmber 15, 1903.

-UNITED STATES -ATENT FFICE.

BENJAMIN WV. MAY, OFCHICAGO, ILLINOIS, ASSIGNOR TO THE SCHWARTZ- KOPFFCOAL DUST FIRING COMPANY, OF CHICAGO, ILLINOIS,A CORPO- RATION OFILLINOIS.

APPARATUS FOR BU RNING. COAL-DUST.

SPECIFICATION forming part of Letters Patent are. 746,864, date beApplication filed November 2, 1900. Serial No. 35,226. (No model.)

To all whom it may concern: in the form of dust, is placed in the hopperand Be it known that I, BENJAMIN W. MAY, a is delivered therefromintothe furnace-chamcitizen of the United States, residing at Ohiher in acontinuous uniform evenly-distrib-- cago, in the county of Cook andState of Illiuted stream by means of the rotary brush, the

5 nois, have invented a new and useful Appabrush flicking or projectingthe particles of ratus for Burning Coal-Dust, of which the dust into thefurnace-chamber and the shall-T following is a specification. ,ingdevice not only serving to prevent clog- This invention relates to anapparatus for ging of the hopper, but also operating to buring coaldust,and is designed as an imshake or jar the dust down into position to :0provement upon the construction set forth be engaged bythe brush andprojected thereand claimed in Patent No. 558,875, issued by into thefurnace-chamber.

April 21, 1896, and reissued April 3, 1900, re-' The particles of dustdelivered in the manissue No. 11,816, to Georg Hilliger. ner set forthand in a continuous evenly- The object of the invention is to provideadistributed stream become ignited and are l5 construction adapted foruse in feeding or consumed while remaining suspended within deliveringcoal-dust or similar fuel into the the furnace-chamber, therebygenerating an combustion-chamber and the proper distribuintense heat,the continuous and uniform tion thereof to secure complete combustion.feed of the dustserving to maintain such heat,

A further object is to providea constructhereby obtaining a markeddegree of effi- 20 tion wherein the coal-dust or other fuel is fedciency in steam production and great econinto the combustion-chamber ina continuous omy in fuel-supply by reason of the completeevenly-distributed stream. V combustion of the coal or other fuel.

Other objects of the invention will appear The present invention relatesto an appamore fully hereinafter. ratus of this nature and type andcontem- 25 Theinvention consists,substantially, in the plates as theessential feature thereof the construction, combination, location, andarsubstitution of an air, steam, or gas jet for rangement, all as willbe more fully hereinthe brush as a means for projecting the parafter setforth, as shown in the accompanyticles of dust into thecombustion-chamber. ing drawings, and finally pointed out in thBy-employing a steam, air, or gas jet through 3 appended claims. which acontinuous stream or sheet of air,

Referring to the accompanying drawings, steam, or other gas is forcedinto the cham- Figure 1 is a view in vertical section of an her at thepoint of delivery of the coal-dust apparatus for feeding coal-dustembodying fuel not only will such fuel be supplied to theprinciplesofmyinvention. Fig. 2isa dethe chamber in a continuous,uniform, and

35 tached detail broken view in perspective of evenly-distributedstream, but the particles the steam or air jet nozzle. Fig. 3 is asimithereof will be sufficiently supported or suslar view showingaslightly-modified arrangepended in the combustion-chamber and will mentof the same. V be moved or carried through the combustion- In the patentto I-Iilliger above mentioned chamber a greater distance than wouldother- 4 is set forth, described, and claimed an apwise be the case,therebyinsuringacomplete 9o paratus for feeding coal-dust comprising acombustion thereof, and hence gaining the hopper and abrush-casinghaving a deliveryadvantage and utilization of the calorific opening, anda shaking device above the power of every particle-of the fuel in theprobrush-casin'g with means for actuating the duction of heat.

45 same, and a rotary brush inthe casing adapt- Referring to theconstruction illustrated in ed to act on the material released by thethe accom'panyingdrawings, reference-signA shaking device to deliver thesame into the designates the hopper in which the coal-dustfurnace-chamber. or similar fuel is placed. Suitably hinged In theoperation of an apparatus embodywithin the hopper or casing B is a plate0.

5 ing these principles of construction the fuel, Spring D, the tensionof which may be readxoo ily adjusted, as by means of the nut E, isarranged to bear against plate 0. Carried by the. plate 0 is a stud orprojection F, arranged to bear against a cam G, carried by a shaft orstud I-I, adapted to receive rotation in any suitable or convenientmanner. The springs D serve to maintain constant engagement or hearingof stud F against the camsurface. Therefore when rotation is imparted toshaft H a vibratory movement is imparted to plate 0. Associated andcooperating with plate 0 is a spring-plate J, connected by links K toplate 0.

From the foregoing description it will be seen that when the cam G isplaced in operation a rapid vibratory movement is imparted to the plates0 and J, thus constituting'a shaking device adapted to alternatelyconfine and release the coal-dust contained in the hopper or casing B,and hence preventing the coaldust from clogging such hopper or casingand permitting the same to be fed or deposited upon the portion L of theplate 0 or other suitable surface, which preferably is inclined towardthe combustion-chamber. In order to regulate the feed of the coal-dustunder the action of the shaking device, a plate M is employed, saidplate being carried by a rocking support actuated by a handle or leverN, the said controlling-plate M cooperating with the shaking device 0 toprovide more or less of an opening when plate 0 is vibrated to permitthe coal-dust or similar fuel to pass from the hopper or casing B fordelivery into the combustion-chamber. O designates a nozzle for an air,steam, or gas jet, the mouth or opening P of said nozzle being locatedimmediately below the point of delivery of the coaldust from the shakingdevice. Thus in the particular construction illustrated the mouth oropening P of the nozzle is located at a point immedtately below thedelivery edge of the platform or apron L, and when the device is inoperation and a continuous sheet or stream of air, steam, or gas isdelivered through the nozzle the coal-dust delivered by the shakingdevice will be projected by such jet into the combustion-chamber, thejetforming not only a carrier for the particles of coaldust, but alsoserving to maintain the same suspended within the combustionchamberuntil complete combustion thereof is seen red, and when an air-jet isemployed a supply of oxygen is secured which aids materially in theproduction ofco'mplete combustion,and hence the generation of a verygreat heat within the combustion-chamber. In order to secure the bestresults, I prefer to arrange the nozzle 0 in a slightly-inclinedposition, so as to give to the sheet or jet of air or the like aslightlyvertical projection into the furnace-chamber.

The cam or other means forimparting movement to the shaking device andthe supporting shaft or stud therefor should be arranged at a point soas not to interfere or to be in line with the projection of the dustunder the influence of the air-jet, and it is obvious that such cam orother suitable actuating apparatus for the shaking device may bearranged at any suitable or convenient point. It is also obvious thatthe specific construction of the shaking device may be altered or variedwithout departure from the spirit or scope of my invention.

I prefer to employ a nozzle having a continuous mouth or opening P,which extends the full width of and in parallel relation to the point ofdelivery of the dust from the shaking device; but it is obvious that, ifdesired, a nozzle or jet having a series of orifices or openings P maybe employed and still fall within the spirit and scope of the invention.(See Fig.

Having now set forth the object and nature of my invention and aconstruction embodying the principles thereof, what I claim as new anduseful and of myown invention, and desire to secure by Letters Patent,is

1. In an apparatus for feeding coal-dust, a hopper A, a shaking-plate Chinged at the mouth thereof and means for reciprocating the plate 0, anormally stationary plate M 'having its edge extended toward the plate0, and a pressure chamber or box having an opening or openings extendingcontinuously along its front side to constitute a nozzle 0, adjacent tothe plate 0, whereby a substantially uniform sheet of dust is droppedinto a substantially uniform sheet of projected air or steam, as and forthe purpose set forth.

2. In an apparatus for feeding coal-dust, a hopper A, a shaking-plate Ohinged at the mouth thereof and means for reciprocating the plate 0, anormally stationary plate M, but adjustable, having its edge extendedtoward the plate 0, and a pressure chamber or box having an opening oropenings'extending continuously along its front side to constitute anozzle 0, adjacent to the plate 0, whereby a substantially uniform sheetof dust is dropped into a substantially uniform sheet of projected airor steam, as and for the purpose set forth.

3. In an apparatus for feeding coal-dust, a hopper A, a shaking-plate Ohinged at the mouth thereof and means for reciprocating the plate 0, anormally stationary plate M, but adjustable, having its edge extendedtoward the plate 0, and an upwardly-deflected pressure chamber or boxhaving an opening or openings extending continuously along its frontside to constitute a nozzle 0, adjacent to the plate 0, whereby asubstantially uni form sheet of dust is dropped into a substantiallyuniform sheet of projected air or steam, as and for the purpose setforth.

In witness whereof I have hereunto set my hand, this 26th day ofOctober, 1900, in the presence of the subscribing witnesses.

BENJAMIN W. MAY.

Witnesses:

GEO. B. SWIFT,

ELSIE A. KEYES.

